seismograph

[sahyz-muh-graf, -grahf, sahys-] Example Sentences

seis·mo·graph

[sahyz-muh-graf, -grahf, sahys-]
noun
any of various instruments for measuring and recording the vibrations of earthquakes.

Origin:
1855–60; seismo- + -graph

seis·mo·graph·ic [sahyz-muh-graf-ik, sahys-] , seis·mo·graph·i·cal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To seismograph

00:10

00:09

00:08

00:07

00:06

00:05

00:04

00:03

00:02

00:01

Seismograph is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a fool or simpleton; ninny.
Example Sentences
  • The screen was crossed by squiggly lines in an imitation of a seismograph.
  • McCloy said he believed a seismograph above was waiting for the signal.
  • Monitor explosion with seismograph to plot channel direction.
Collins
World English Dictionary
seismograph (ˈsaɪzməˌɡrɑːf, -ˌɡræf)
 
n
Also called: seismometer an instrument that registers and records the features of earthquakes. A seismogram () is the record from such an instrument
 
seismographic
 
adj
 
seismographer
 
n
 
seis'mography
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
seismograph   (sīz'mə-grāf')  Pronunciation Key 
An instrument that detects and records vibrations and movements in the Earth, especially during an earthquake. Most seismographs employ a pendulum mounted within a rigid framework and connected to a mechanical, optical, or electromagnetic recording device. When the Earth vibrates or shakes, inertia keeps the pendulum steady with respect to the movements of the frame, producing a graphic record of the duration and intensity of the Earth's movements. Separate instruments are needed to record the north-south horizontal, east-west horizontal, and vertical components of a tremor. By comparing the records produced by seismographs located in three or more locations across the Earth, the location and strength of an earthquake can be determined.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Britannica
Encyclopedia

seismograph

instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon. Seismographs are equipped with electromagnetic sensors that translate ground motions into electrical changes, which are processed and recorded by the instruments' analog or digital circuits. A record produced by a seismograph on a display screen or paper printout is called a seismogram. Although originally designed to locate natural earthquakes, seismographs have many other uses, such as petroleum exploration, investigation of the Earth's crust and lower layers, and monitoring of volcanic activity.

Learn more about seismograph with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Dictionary.com, LLC. Copyright © 2012. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT